Added a name, crafting recipe, and item texture

src/main/resources/assets/unicopia/lang/en_US.lang

@@ -15,6 +15,7 @@ tile.cloud_banister.name=Banister
 tile.cloud_farmland.name=Tilled Clouds
 
 tile.hive.name=Hive Wall
+tile.cuccoon.name=Changeling Cuccoon
 
 tile.apple_leaves.name=Apple Leaves
 tile.apple_sapling.name=Apple Seeds

src/main/resources/assets/unicopia/models/item/cuccoon.json

@@ -1,6 +1,6 @@
 {
     "parent": "item/generated",
     "textures": {
-        "layer0": "minecraft:items/apple"
+        "layer0": "unicopia:items/cuccoon"
     }
 }

src/main/resources/assets/unicopia/recipes/cuccoon.json

@@ -0,0 +1,17 @@
+{
+  "type": "minecraft:crafting_shaped",
+  "pattern": [
+    "###",
+    "#*#",
+    "###"
+  ],
+  "key": {
+    "#": [
+      { "item": "minecraft:slime" }
+    ],
+    "*": [
+      { "item": "unicopia:gem" }
+    ]
+  },
+  "result": { "item": "unicopia:cuccoon", "count": 1 }
+}